JP2732007B2 - How to build underground structures - Google Patents
How to build underground structuresInfo
- Publication number
- JP2732007B2 JP2732007B2 JP1494893A JP1494893A JP2732007B2 JP 2732007 B2 JP2732007 B2 JP 2732007B2 JP 1494893 A JP1494893 A JP 1494893A JP 1494893 A JP1494893 A JP 1494893A JP 2732007 B2 JP2732007 B2 JP 2732007B2
- Authority
- JP
- Japan
- Prior art keywords
- roof
- cutter plate
- concrete box
- steel pipe
- friction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、特に、鉄道、道路等の
下部地中の土被りの浅い位置に大幅員の地下構造物を横
断方向に掘進建設する際に上部交通に支障を与えること
なく施工することができる地下構造物の構築方法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for obstructing upper traffic, particularly when a large number of underground structures are excavated and constructed in a shallow position under the ground such as a railway or a road. The present invention relates to a method for constructing an underground structure that can be constructed without any problem.
【０００２】[0002]
【従来の技術】鉄道、道路等の下部地中に大幅員の鉄筋
コンクリート製の地下構造物を横断方向に掘進させるに
は、上部交通を支承するための防護工が必要となり、か
かる防護工として従来鋼管パイプを水平に並列させるパ
イプルーフを設けることなどが挙げられる。しかし、こ
のような従来のパイプルーフ防護工では、このパイプル
ーフ防護工を施工するための工事は、トンネル掘削の工
事や地下構造物の構築工事に先行して行わなければなら
ず、３種の工事を別々に施工するため、工期、工費が大
となり、苦労と経済的損失が大きい。2. Description of the Related Art In order to dig deeply underground structures made of reinforced concrete in the underground such as railways and roads in the transverse direction, it is necessary to provide a protective work to support upper traffic. Providing a pipe roof for horizontally arranging steel pipes may be mentioned. However, in such conventional pipe roof protection works, construction work for this pipe roof protection work must be performed prior to tunnel excavation work and construction work for underground structures, and three types of pipe roof protection work must be performed. Since the construction is performed separately, the construction period and construction costs are large, and the labor and economic loss are large.
【０００３】また、パイプルーフとしての鋼管パイプを
地中に埋設し、それによって鉄道及び土被り分を支持し
てその下方に地下道となるトンネルを構築するものであ
るから、土被り分と鋼管パイプの直径に加えてトンネル
天端とパイプルーフ間にトンネル天端を作る際の作業空
間が必要となり、これらの分だけトンネルを深く構築し
なければならない。Further, since a steel pipe as a pipe roof is buried in the ground, thereby supporting a railway and an overburden, and constructing a tunnel serving as an underpass below the underlay, the overburden and the steel pipe are formed. In addition to the diameter of the tunnel, a work space is required to make the tunnel top between the tunnel top and the pipe roof, and the tunnel must be built deeper by these amounts.
【０００４】これに対して、出願人は先に、図５に示す
ような地下構造物の構築方法を発明し、これを箱型ルー
フ工法と名付けた。この工法によれば、地中に掘進させ
る地下構造物の防護工を別工事として施工することな
く、地下構造物の掘進と同時に行うので数種の工事を同
時に一挙に行うことができ、しかも安全かつ確実に、ま
た安価に工事ができ、さらに、土被りも浅く施工でき
る。On the other hand, the applicant has previously invented a method of constructing an underground structure as shown in FIG. 5, and has named this method a box-type roof construction method. According to this method, several types of work can be performed simultaneously at once because excavation of the underground structure is performed simultaneously without excavation of the underground structure to be excavated into the ground without separate construction. Construction can be performed reliably and at low cost, and the earth covering can be made shallow.
【０００５】鉄道等上部交通１の脇に土留鋼矢板２を打
設して、発進坑３と到達坑４を築造し、該発進坑３内に
圧入機（図示せず）を設置してこれで断面箱型のルーフ
用鋼管５を到達坑４へ向けて圧入させる。前記圧入機は
ルーフ用鋼管５のジャッキ等による押出機構とオーガー
等による鋼管５の内部掘削機構とを有する。A steel sheet pile 2 is placed beside the upper traffic 1 such as a railway to construct a starting pit 3 and a reaching pit 4, and a press-fitting machine (not shown) is installed in the starting pit 3. Then, the box-shaped roof steel pipe 5 is pressed into the reaching shaft 4. The press-fitting machine has a pushing mechanism for jacking the steel pipe 5 for the roof and an internal digging mechanism for the steel pipe 5 using an auger or the like.
【０００６】ルーフ用鋼管５は、略正方形断面の箱型筒
体であり、左右側面に鉤状の継手を長手方向に連続して
形成し、また上面に平板鋼板からなるフリクションカッ
タープレート６を載置している。かかるルーフ用鋼管５
は単位筒体を１本ずつ圧入するが、端部に箱抜き継手フ
ランジを形成し、この継手フランジ同士をボルト、ナッ
トで締結することにより１ピースずつ長さ方向に継ぎ足
されて必要長を埋設することができ、また、フリクショ
ンカッタープレート６はその先端はルーフ用鋼管５の先
端に溶接等で固着するが、先端以外はルーフ用鋼管５の
上面に重合わせるだけであり、ルーフ用鋼管５を１本ず
つ順次接続していく時に、このフリクションカッタープ
レート６もルーフ用鋼管５の長さ分だけ溶接等でつない
で長くしていく。The roof steel pipe 5 is a box-shaped cylindrical body having a substantially square cross section, and has hook-shaped joints formed continuously on the left and right sides in the longitudinal direction, and a friction cutter plate 6 made of a flat steel plate is mounted on the upper surface. It is location. Such a steel pipe for roof 5
Press-fits unit cylinders one by one, but forms a boxed joint flange at the end, and fastens these joint flanges with bolts and nuts to add one piece at a time in the length direction and bury the required length In addition, the friction cutter plate 6 has its tip fixed to the tip of the steel pipe 5 for roof by welding or the like, but other than the tip only overlaps with the upper surface of the steel pipe 5 for roof. When sequentially connecting one by one, the friction cutter plate 6 is also connected and lengthened by the length of the roof steel pipe 5 by welding or the like.
【０００７】ルーフ用鋼管５の並べ方は、計画トンネル
断面の外周に合わせるもので、発進坑３内に反力壁８、
地下構造物としてのコンクリート函体９をセットし、反
力壁８とコンクリート函体９との間にはストラット14お
よび元押し推進ジャッキ10を設け、コンクリート函体９
の先端に刃口11を設ける。The arrangement of the roof steel pipes 5 is in accordance with the outer circumference of the planned tunnel section, and the reaction wall 8,
A concrete box 9 as an underground structure is set, and a strut 14 and a primary pushing jack 10 are provided between the reaction wall 8 and the concrete box 9.
The cutting edge 11 is provided at the tip of the.
【０００８】コンクリート函体９の先端と前記ルーフ用
鋼管５の後端との間には該ルーフ用鋼管５を押し出す小
ジャッキ12を配設し、また、フリクションカッタープレ
ート６の後端は止め部＊13で発進坑３側に固定し、一
方、到達坑４側に仮受台15を設ける。A small jack 12 for pushing out the roof steel pipe 5 is disposed between the front end of the concrete box 9 and the rear end of the roof steel pipe 5, and the rear end of the friction cutter plate 6 is a stopper. At * 13, it is fixed to the starting pit 3 side, while the temporary receiving stand 15 is provided at the reaching pit 4 side.
【０００９】フリクションカッタープレート６の先端と
ルーフ用鋼管５の前端との固着を解除しておき、推進ジ
ャッキ10を伸長して反力壁８に反力を取りながらコンク
リート函体９を掘進させるが、その際、小ジャッキ12で
コンクリート函体９に先行してルーフ用鋼管５を押し進
める。この時、フリクションカッタープレート６は地中
に残置される。The concrete box 9 is excavated while releasing the fixing of the front end of the steel pipe 5 for roof and the front end of the friction cutter plate 6 while extending the propulsion jack 10 to take a reaction force on the reaction wall 8. At this time, the roof steel pipe 5 is pushed forward by the small jack 12 before the concrete box 9. At this time, the friction cutter plate 6 is left underground.
【００１０】このようにフリクションカッタープレート
６を残しながら、ルーフ用鋼管５およびコンクリート函
体９を前進させることで、これらルーフ用鋼管５および
コンクリート函体９は地盤とは縁が切れた状態で進み、
土圧による摩擦抵抗を受けずにすむ。また、コンクリー
ト函体９を掘進させるには、刃口11の前部を掘削する
が、この作業はルーフ用鋼管５で防護されたものとな
り、土砂崩壊のおそれがなく安全に行える。到達坑４に
出たルーフ用鋼管５の先端部分は仮受台15で受けながら
ボルト、ナットでの締結を解除して１ピースずつ順次撤
去する。As described above, the roof steel pipe 5 and the concrete box 9 are advanced while the friction cutter plate 6 is left, so that the roof steel pipe 5 and the concrete box 9 advance in a state where the edge of the ground is cut off. ,
No frictional resistance due to earth pressure. In order to make the concrete box 9 excavate, the front part of the cutting edge 11 is excavated. However, this work is protected by the steel pipe 5 for the roof, and the work can be performed safely without the risk of earth and sand collapse. The front end of the steel pipe for roof 5 that has come out to the reaching pit 4 is removed by bolts and nuts and removed one by one while being received by the temporary receiving table 15.
【００１１】なお、コンクリート函体９の推進方法に関
しては、到達坑４側に反力受材及びセンターホール式の
けん引ジャッキを設け、一端を地下構造物に定着具で定
着したＰ．Ｃ鋼線によるけん引部材をこのけん引ジャッ
キで引くことにより、到達坑４側から地下構造物９を引
き込むようにすることもできる。また、小ジャッキ12を
設けずにコンクリート函体９の前端で直接ルーフ用鋼管
５を押すようにすることもできる。Regarding the method of propelling the concrete box 9, a reaction force receiving member and a center hole type towing jack are provided on the reaching shaft 4 side, and one end of the concrete box 9 is fixed to the underground structure by a fixing tool. By pulling a towing member made of C steel wire with this towing jack, the underground structure 9 can be drawn from the reaching pit 4 side. Further, the roof steel pipe 5 can be directly pushed by the front end of the concrete box 9 without providing the small jack 12.
【００１２】[0012]
【発明が解決しようとする課題】このようにフリクショ
ンカッタープレート６はこれがあるために、ルーフ用鋼
管５およびコンクリート函体９が地盤とは縁が切れた状
態で進み、土圧による摩擦抵抗を受けずにすむものであ
るが、コンクリート函体９とルーフ用鋼管５との相互の
位置関係にもよるがコンクリート函体９の上面にフリク
ションカッタープレート６を直接的にかつ完全に接合さ
せることは困難である。Since the friction cutter plate 6 has such a structure, the roof steel pipe 5 and the concrete box 9 advance with the edge cut off from the ground, and receive frictional resistance due to earth pressure. Although it is unnecessary, it is difficult to directly and completely join the friction cutter plate 6 to the upper surface of the concrete box 9 depending on the mutual positional relationship between the concrete box 9 and the steel pipe 5 for the roof. .
【００１３】これはフリクションカッタープレート６と
コンクリート函体９の上面とを完全に合致させるために
は、ルーフ用鋼管５の上面とコンクリート函体９の上面
とを合わせる必要があるが、図６に示すようにそれがず
れ易いことによる。In order to completely match the friction cutter plate 6 with the upper surface of the concrete box 9, it is necessary to match the upper surface of the roof steel pipe 5 with the upper surface of the concrete box 9. As shown, it is easy to shift.
【００１４】フリクションカッタープレート６とコンク
リート函体９の上面との間に隙間を生じると、その分フ
リクションカッタープレート６上方の土がこの隙間に回
り込み、陥没等の現象で地表面に悪影響を与えるおそれ
がある。When a gap is formed between the friction cutter plate 6 and the upper surface of the concrete box 9, the soil above the friction cutter plate 6 goes around the gap, which may adversely affect the ground surface due to a phenomenon such as depression. There is.
【００１５】本発明の目的は前記従来例の不都合を解消
し、フリクションカッタープレートを先に配設し、この
フリクションカッタープレート下でコンクリート函体を
押し進める場合に、フリクションカッタープレートとコ
ンクリート函体との間に隙間なく、かつ、コンクリート
函体が低い摩擦で進み易い状態で係合させることができ
る地下構造物の構築方法を提供することにある。An object of the present invention is to solve the above-mentioned disadvantages of the prior art, in which a friction cutter plate is disposed first and a concrete box is pushed under the friction cutter plate. An object of the present invention is to provide a method of constructing an underground structure capable of engaging with a concrete box in a state in which the concrete box can easily advance with low friction without any gap therebetween.
【００１６】[0016]
【課題を解決するための手段】本発明は前記目的を達成
するため、上面にフリクションカッタープレートを配設
した断面箱型のルーフ用鋼管を並列させて発進坑側から
到達坑側へと地中に圧入し、フリクションカッタープレ
ートを地中に残置しながらルーフ用鋼管およびその後方
の地下構造物用のコンクリート函体を順次推進させる地
下構造物の構築方法において、コンクリート函体は外周
面で前後方向に延びるように鋼材をリブ状に並べて設
け、鋼材間には摩擦軽減材としての砂を充填してベット
を作製し、もしくは、コンクリート函体は外周面で前後
方向に延びるように凸条を一体的に設け、この凸条間の
凹部には摩擦軽減材としての砂を充填して全体としてベ
ットを作製し、このベットをフリクションカッタープレ
ートに下側から当接させることを要旨とするものであ
る。According to the present invention, in order to achieve the above-mentioned object, a steel pipe for a roof having a box-shaped cross section having a friction cutter plate disposed on an upper surface thereof is arranged side by side, and the underground is moved from a starting pit side to a destination pit side. In the method of building an underground structure in which the roof steel pipe and the concrete box for the underground structure behind it are sequentially pushed while leaving the friction cutter plate in the ground, the concrete box is The steel material is arranged in ribs so that it extends in the shape of a rib, and sand is filled between the steel materials as a friction reducing material to make a bed, or the concrete box is integrated with a ridge so that it extends in the front and rear direction on the outer peripheral surface The recess between the ridges is filled with sand as a friction reducing material to make a bed as a whole, and this bed is brought into contact with the friction cutter plate from below. It is an gist thereby.
【００１７】[0017]
【作用】本発明によれば、コンクリート函体の外周面に
砂を充填してベットを作製し、このベットを介してフリ
クションカッタープレートにコンクリート函体を係合さ
せるので、その間に隙間が生じ、土砂が入り込むことは
ない。さらに、このベットは摩擦軽減材としての砂を充
填してなるものであるから、フリクションカッタープレ
ートの効果を助長させ、コンクリート函体は地盤とは完
全に縁が切れた状態で進み、土圧による摩擦抵抗を受け
ずにすむ。According to the present invention, the outer periphery of the concrete box is filled with sand to form a bed, and the concrete box is engaged with the friction cutter plate via the bed, so that a gap is generated therebetween, Sediment does not enter. Furthermore, since this bed is filled with sand as a friction reducing material, it promotes the effect of the friction cutter plate, and the concrete box advances with the edge completely cut off from the ground, and due to earth pressure Avoids frictional resistance.
【００１８】[0018]
【実施例】以下、図面について本発明の実施例を詳細に
説明する。図１本発明の地下構造物の構築方法の第１実
施例を示す要部の縦断正面図、図２は同上縦断側面図
で、工法の主要部分については前記図５で説明した従来
例と同じく、上面にフリクションカッタープレート６を
配設した断面箱型のルーフ用鋼管５を並列させて発進坑
３側から到達坑４側へと地中に圧入し、フリクションカ
ッタープレート６を地中に残置しながらルーフ用鋼管５
およびその後方の地下構造物用のコンクリート函体９を
順次推進させる地下構造物の構築方法であり、詳細説明
は前記従来例と同一なので省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a vertical sectional front view of a main part showing a first embodiment of the method of constructing an underground structure of the present invention, FIG. 2 is a vertical sectional side view of the same, and the main part of the construction method is the same as the conventional example described in FIG. The roof steel pipes 5 each having a box-shaped cross section and having the friction cutter plate 6 disposed on the upper surface are arranged side by side and pressed into the ground from the start pit 3 to the destination pit 4, and the friction cutter plate 6 is left under the ground. Steel pipe for roof 5
And a method of constructing an underground structure for sequentially propelling a concrete box 9 for an underground structure behind it, and a detailed description thereof is omitted since it is the same as that of the conventional example.
【００１９】本発明は、コンクリート函体９は外周面、
例えば上面にこのコンクリート函体９の前後方向に延び
るようなＨ型鋼材16をそのフランジが上下になるように
して設けた。このＨ型鋼材16はフリクションカッタープ
レート６の幅以下の間隔を存してリブ状に並べて設け
る。According to the present invention, the concrete box 9 has an outer peripheral surface,
For example, on the upper surface, an H-shaped steel material 16 extending in the front-rear direction of the concrete box 9 is provided so that its flange is up and down. The H-shaped steel members 16 are arranged in a rib shape with an interval equal to or less than the width of the friction cutter plate 6.
【００２０】なお、Ｈ型鋼材16はコンクリート函体９を
作製する際にその下フランジを埋め込むようにしてこの
コンクリート函体９に一体的に設けてもよい。さらに、
Ｈ型鋼材16の代わりに他のＴ型鋼材やＩ型鋼材など他の
形状の鋼材を使用することもある。The H-shaped steel material 16 may be provided integrally with the concrete box 9 so that the lower flange is embedded when the concrete box 9 is manufactured. further,
In place of the H-shaped steel material 16, another steel material having another shape such as another T-shaped steel material or an I-shaped steel material may be used.
【００２１】このようにしてコンクリート函体９を発進
坑を設置する際に、前記Ｈ型鋼材16の間には摩擦軽減材
としての砂17を充填してベット18を作製する。この砂17
はＨ型鋼材16の上方にまで盛り上げて、Ｈ型鋼材16を越
えて隣のＨ型鋼材16間につながるようにしておいてもよ
い。When the concrete box 9 is set in the starting pit in this way, the sand 17 as a friction reducing material is filled between the H-shaped steel members 16 to form the bed 18. This sand 17
May be raised to above the H-shaped steel material 16 so as to be connected between the adjacent H-shaped steel materials 16 beyond the H-shaped steel material 16.
【００２２】本発明ではフリクションカッタープレート
６の後端は止め部材で発進坑３側に固定することなく、
コンクリート函体９の上方に重なる位置まで延ばしてお
き、該フリクションカッタープレート６の後端の下側を
前記ベット18を当接させる。その場合、フリクションカ
ッタープレート６はＨ型鋼材16間に両サイドが載るよう
に架け渡される配置となる。In the present invention, the rear end of the friction cutter plate 6 is not fixed to the starting shaft 3 side by a stopper member,
The bed 18 is extended to a position overlapping the concrete box 9 and the lower end of the friction cutter plate 6 is brought into contact with the bed 18. In this case, the friction cutter plate 6 is arranged so as to be bridged between the H-shaped steel members 16 so that both sides thereof are placed.
【００２３】そしてフリクションカッタープレート６を
残しながら、コンクリート函体９を押し進めれば、コン
クリート函体９は地盤とは完全に縁が切れた状態で進
み、土圧による摩擦抵抗を受けずにすむ。If the concrete box 9 is pushed forward while the friction cutter plate 6 is left, the concrete box 9 advances with the edge completely cut off from the ground, and does not receive frictional resistance due to earth pressure.
【００２４】図３、図４は本発明の第２実施例を示すも
ので、コンクリート函体９は外周面、例えば上面に前後
方向に延びるように凸条19をコンクリートで一体的に設
け、この凸条19間には凹部20が形成されるようにした。
かかる凸条19および凹部20はコンクリート函体９を成形
する際に同時に形成するようにすればよい。FIGS. 3 and 4 show a second embodiment of the present invention. The concrete box 9 is provided integrally with a ridge 19 made of concrete so as to extend in the front-rear direction on the outer peripheral surface, for example, the upper surface. A recess 20 is formed between the ridges 19.
The ridges 19 and the recesses 20 may be formed simultaneously when the concrete box 9 is formed.
【００２５】そしてこの凹部20に摩擦軽減材としての砂
17を充填して全体としてベット18を作製し、このベット
18をフリクションカッタープレート６に下側から当接さ
せるようにした。なお、凹部20の幅はフリクションカッ
タープレート６の幅より少し小さく、フリクションカッ
タープレート６は凸部19間に両サイドが載るように架け
渡される配置となるのは前記従来例と同じである。The recess 20 has sand as a friction reducing material.
Filling 17 makes a bed 18 as a whole, and this bed
18 was brought into contact with the friction cutter plate 6 from below. Note that the width of the recess 20 is slightly smaller than the width of the friction cutter plate 6, and the friction cutter plate 6 is arranged so as to be bridged between the protrusions 19 so that both sides thereof are placed, as in the above-described conventional example.
【００２６】この第２実施例の場合は、コンクリート函
体９に直接砂17を充填できるものなので、コスト的にも
Ｈ型鋼材16を使用する第１実施例よりは安価なものとな
る。In the case of the second embodiment, since the concrete box 9 can be directly filled with the sand 17, the cost is lower than that of the first embodiment using the H-shaped steel material 16.
【００２７】[0027]
【発明の効果】以上述べたように本発明の地下構造物の
構築方法は、上面にフリクションカッタープレートを配
設した断面箱型のルーフ用鋼管を並列させて発進坑側か
ら到達坑側へと地中に圧入し、フリクションカッタープ
レートを地中に残置しながらルーフ用鋼管およびその後
方の地下構造物用のコンクリート函体を順次推進させる
地下構造物の構築方法において、フリクションカッター
プレートとコンクリート函体との間に隙間なく、かつ、
コンクリート函体が低い摩擦で進み易い状態で係合させ
ることができ、地表面に悪影響を与えるおそれもないも
のである。As described above, according to the method of constructing an underground structure of the present invention, a box-shaped roof steel pipe having a friction cutter plate disposed on an upper surface thereof is arranged in parallel to move from a start pit side to a destination pit side. A method for constructing an underground structure in which a roof steel pipe and a concrete box for an underground structure therebelow are sequentially propelled while being pressed into the ground and leaving the friction cutter plate in the ground, the friction cutter plate and the concrete box With no gap between
The concrete box can be engaged in a state where it can easily advance with low friction, and there is no possibility that the concrete surface will have an adverse effect on the ground surface.
【図１】本発明の地下構造物の構築方法の１実施例を示
す要部の縦断正面図である。FIG. 1 is a longitudinal sectional front view of a main part showing an embodiment of a method for constructing an underground structure according to the present invention.
【図２】本発明の地下構造物の構築方法の１実施例を示
す要部の縦断側面図である。FIG. 2 is a longitudinal sectional side view of a main part showing one embodiment of the method of constructing an underground structure according to the present invention.
【図３】本発明の地下構造物の構築方法の１実施例を示
す要部の縦断正面図である。FIG. 3 is a vertical sectional front view of an essential part showing one embodiment of the method of constructing an underground structure according to the present invention.
【図４】本発明の地下構造物の構築方法の１実施例を示
す要部の縦断側面図である。FIG. 4 is a longitudinal sectional side view of a main part showing one embodiment of the method of constructing an underground structure according to the present invention.
【図５】本発明を使用しない従来工法の縦断正面図であ
る。FIG. 5 is a vertical sectional front view of a conventional method not using the present invention.
【図６】本発明を使用しない従来工法の要部の縦断正面
図である。FIG. 6 is a longitudinal sectional front view of a main part of a conventional method not using the present invention.
１…上部交通 ２…土留鋼矢板 ３…発進坑 ４…到達坑 ５…ルーフ用鋼管 ６…フリクションカッタープレート ８…反力壁 ９…コンクリート函体 10…元押し推進ジャッキ 11…刃口 12…小ジャッキ 13…止め部材 14…ストラット 15…仮受台 16…Ｈ型鋼材 17…砂 18…ベッド 19…凸条 20…凹部 1 top traffic 2 earth pile pile 3 start shaft 4 reaching shaft 5 steel pipe for roof 6 friction friction plate 8 reaction wall 9 concrete box 10 main pushing jack 11 cutting edge 12 small Jack 13 ... Stopping member 14 ... Strut 15 ... Temporary support 16 ... H-shaped steel 17 ... Sand 18 ... Bed 19 ... Protrusion 20 ... Recess
Claims (2)
配設した断面箱型のルーフ用鋼管を並列させて発進坑側
から到達坑側へと地中に圧入し、フリクションカッター
プレートを地中に残置しながらルーフ用鋼管およびその
後方の地下構造物用のコンクリート函体を順次推進させ
る地下構造物の構築方法において、コンクリート函体は
外周面で前後方向に延びるように鋼材をリブ状に並べて
設け、鋼材間には摩擦軽減材としての砂を充填してベッ
トを作製し、このベットをフリクションカッタープレー
トに下側から当接させることを特徴とした地下構造物の
構築方法。1. A box-shaped roof steel pipe having a friction cutter plate disposed on an upper surface thereof is arranged side by side and pressed into the ground from the start pit side to the destination pit side, while leaving the friction cutter plate in the ground. In a method of constructing an underground structure in which a roof steel pipe and a concrete box for an underground structure behind the roof are sequentially propelled, the concrete box is provided by arranging steel materials in a rib shape so as to extend in the front-rear direction on the outer peripheral surface. , A bed is prepared by filling sand as a friction reducing material, and the bed is brought into contact with a friction cutter plate from below.
配設した断面箱型のルーフ用鋼管を並列させて発進坑側
から到達坑側へと地中に圧入し、フリクションカッター
プレートを地中に残置しながらルーフ用鋼管およびその
後方の地下構造物用のコンクリート函体を順次推進させ
る地下構造物の構築方法において、コンクリート函体は
外周面で前後方向に延びるように凸条を一体的に設け、
この凸条間の凹部には摩擦軽減材としての砂を充填して
全体としてベットを作製し、このベットをフリクション
カッタープレートに下側から当接させることを特徴とし
た地下構造物の構築方法。2. A steel pipe for a roof having a box-shaped cross section having a friction cutter plate disposed on the upper surface thereof is arranged in parallel and pressed into the ground from the start pit side to the destination pit side, while leaving the friction cutter plate in the ground. In a method of constructing an underground structure in which a roof steel pipe and a concrete box for an underground structure behind the roof are sequentially propelled, the concrete box is integrally provided with a ridge so as to extend in the front-rear direction on the outer peripheral surface,
A method of constructing an underground structure, characterized in that the recess between the ridges is filled with sand as a friction reducing material to form a bed as a whole, and the bed is brought into contact with a friction cutter plate from below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1494893A JP2732007B2 (en) | 1993-02-01 | 1993-02-01 | How to build underground structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1494893A JP2732007B2 (en) | 1993-02-01 | 1993-02-01 | How to build underground structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06228959A JPH06228959A (en) | 1994-08-16 |
| JP2732007B2 true JP2732007B2 (en) | 1998-03-25 |
Family
ID=11875204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1494893A Expired - Lifetime JP2732007B2 (en) | 1993-02-01 | 1993-02-01 | How to build underground structures |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2732007B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7061773B2 (en) * | 2020-01-27 | 2022-05-02 | 国立大学法人埼玉大学 | Construction method of underground structure and friction reducing material used for it |
-
1993
- 1993-02-01 JP JP1494893A patent/JP2732007B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06228959A (en) | 1994-08-16 |
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